.container-3d1 {
  background: #e9ecef;
  color: #333;
  /* margin-top: -20px; */
  padding: 0;
  z-index: 0;
  border-radius: 20px;
  box-shadow: 7px 7px 12px rgba(0, 0, 0, .4), -7px -7px 12px rgba(255, 255, 255, .9);
}

.container-3d2 {
  background: #e9ecef;
  color: #333;
  margin-top: 80px;
  padding: 0;
  z-index: 0;
  border-radius: 20px;
  box-shadow: 7px 7px 12px rgba(0, 0, 0, .4), -7px -7px 12px rgba(255, 255, 255, .9);

  position: relative;
}